We look at the division of 3879569 by 38 
The aim is to understand the frequency of 38 in 3879569.

Advancing to step 1:
The number 38 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 38

Advancing to step 2:
38 goes into 38 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 38 away from 38, we end up with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 38

Let's proceed to step 3:
When dividing 7 by 38, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 38

Let's proceed to step 4:
38 goes into 79 2 times with a remainder of 3.
The next digit of our result is 2. 
Result so far: 102.0
If we take 76 away from 79, we end up with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 38

Going ahead to step 5:
38 goes into 35 0 times with a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 1020.0
The remainder is 35 after subtracting 0 from 35.
Bring next digit (6) of the dividend behind the 35 and repeat the process: 356 / 38

On to step 6:
The number 38 fits into 356 9 times, leaving a remainder of 14.
The number 9 becomes the next digit in our result. 
Result so far: 10209.0
If we subtract 342 from 356, we get 14.
Fetch the next digit (9) from the dividend, attach it to 14 and continue: 149 / 38

Moving on to step 7:
38 goes into 149 3 times with a remainder of 35.
The next digit of our result is 3. 
Result so far: 102093.0
Subtract 114 from 149 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 8:
350 divided by 38 is 9 with a remainder of 8.
Record the quotient 9 as the next digit in the result. 
Result so far: 102093.9
Subtracting 342 from 350 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
38 goes into 80 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 102093.92
Subtract 76 from 80 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
If we divide 40 by 38, we get 1 and a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 102093.921
Subtract 38 from 40 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
20 divided by 38 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 102093.921
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
38 can be fit into 200 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 102093.92105
Subtract 190 from 200 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
38 can be fit into 100 2 times, resulting in a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 102093.921052
Deduct 76 from 100 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 14:
When dividing 240 by 38, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 102093.9210526
The remainder is 12 after subtracting 228 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 15:
38 goes into 120 3 times with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 102093.92105263
If we subtract 114 from 120, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 102093.92105263 with a remainder of 6e-09.